Solid-state drive refers to a data storage device that uses solid-state memory to store its persistent data.

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Enabling Disk Encryption on DC S 3700?

I have a server running Debian stable with two 100GB Intel DC S 3700 drives in a Linux MD RAID 1. According to Intel, these drives support 256-bit AES encryption and I would like to encrypt the data ...
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1answer
24 views

RAID5 array over-provisioning by creating smaller array?

I did actually read the following thread: How to over-provision an Intel SSD RAID Array via the Dell H700 PERC RAID Controller It did give much information, however not an answer to my question in ...
2
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1answer
82 views

How to disable automatic garbage collection on an SSD?

Solid State Drives (SSD) have a garbage collection functionality which makes space from deleted files available. It is triggered automatically by the drive via a TRIM command sent by the OS Is ...
2
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1answer
887 views

IO-intensive processes hang with iowait, but no activity going on

I have a bunch of IO-intensive jobs, and to boost performance, I just installed two SSDs in a compute server, one as a scratch file system, one as swap. After running for some time, all my processes ...
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1answer
56 views

Linux mdraid RAID 6, disks drop out randomly every few days

I have some servers that run Debian 8 with 8x800GB SSD configured as RAID6. All disks are connected to a LSI-3008 flashed to IT mode. In each server I also have a 2-disk pair as RAID1 for the OS. ...
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1answer
63 views

SSDs with the Intel RMS25CB080

I've bought a new server which only allows disks to be connected to a built-in Intel RMS25CB080 RAID controller card. The server has 8 2.5" slots. I'm considering using SSDs with this server, however ...
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1answer
748 views

6 times slower disk write in RAID10 on Ubuntu 14.04 after rebuild

OS: Ubuntu 14.04 LTS Software Raid 10: 4x120Gb Intel 530 SSDs Initial tests: 1.2 GB/s Write 5.2 GB/s Read I did some tests to check if everything will go alright with a failed disk: I set as ...
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1answer
885 views

Slow disk performance on PowerEdge R720

Every few months PowerEdge with SSD (INTEL SSDSA2BW60) comes with results like: hdparm -tT /dev/sda /dev/sda: Timing cached reads: 690 MB in 2.00 seconds = 344.84 MB/sec Timing buffered disk ...
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1answer
345 views

100% SSD usage Linux

Every 20-30 seconds my HDD usage goes to 100% (iostat). iotop is showing that [flush-8:0] is using 99% HDD during these times. In between HDD usage is 1-10%. iostat output: 04/22/2013 08:58:44 AM ...
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1answer
232 views

Raid in SSD issue with Trim

Yesterday i posted a question about Storage Spaces and ReFS about cache turn off (write through mode) and its settled. I thought it will be simple, but it turns out far from simple and ran into ...
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1answer
101 views

When Upgrading My 3.5" HDs To SSD HDs Can I Continue To Still Use RAID 1 (MIRROR)?

I'm upgrading my old 3.5" HDs to a set of SSD HDs. I currently run a RAID 1 (MIRROR) array for the 2 old drives (just in case) and want to know how I should rollout the new SSD drives... I have been ...
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1answer
741 views

Install a SATA SSD in hot swap server

I am trying to install a SATA SSD into a hot swappable server (Dell PowerEdge T320). The drive is not visible within the Windows 2008 R2. Server details: Dell T320 PowedEdge PERC H710 Raid ...
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0answers
367 views

Running fstrim as cronjob - what happens when interrupted by shutdown

One of the ways to implement fstrim on a file system, it to make a cron.daily task that runs fstrim /. This is preferred over -o discard (mount option) by a lot of people, because the latter can make ...
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0answers
445 views

NVMe driver for Illumos: can it be considered usable?

Can the NVM Express (NVMe) driver driver-storage-nvme for Illumos be considered usable? It would be nice to use e.g. an Intel DC P3700 PCIe drive for L2ARC as the SAS2 and 3 SSD drives are awfully ...
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0answers
223 views

Hbase block locality index is always 0

I have a Hbase (v 0.94.19 with Hadoop 1.2.1) setup with one master machine and two region servers. Each region server has 16 GB heap (6.4 GB cache, 4.0 GB memstore) and 1.6 TB (2 X 800 GB) SSD disk ...
2
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0answers
321 views

Centos 6.5, PXE Boot fails to recognize the SSD device

Goal: Add correct ahci/scsi to my initrd for PXE install of OS. I am using Centos6.5 minimal install ISO. I have a Serial interface only (no VGA), new low cost rangley processor system and need to ...
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0answers
914 views

TRIM on OCZ RevoDrive 3 on CentOS

I've got an OCZ RevoDrive 3 mounted as / on my CentOS 6.3 box running kernel 2.6.32-220.17.1.el6.x86_64. /boot is on a HDD since OCZ's driver apparently doesn't yet support booting directly to it. ...
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0answers
27 views

SSD bandwidth issue and analysis

I have Intel's P3700 SSD mounted on a Lenovo x3650 M5 server with two Intel Xeon E5-2630 v3 CPUs. The server is running Ubuntu 14.04 with 4.6.4 Kernel. I've been using fio to benchmark the SSD using ...
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0answers
40 views

SSD Temperture Increases during idle

I have 4 Samsung 850 EVO SSDs in a mdraid 10 array inside a high performance simple NAS. running Centos6.8 minimal. I have found that the SSD tempertures start to increase on their own without any ...
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0answers
33 views

mdadm scaling beyond 6 disks w/ ssd's

It seems Linux mdadm produces less writes & iops as more disks are added to an array. For example, I have tested the following configurations, with the defaults aside from changing the I/O ...
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0answers
16 views

Does mdstat showing very different block sizes for identical drives indicate a failing drive?

One of my servers has a RAID1 array composed of two 240GB SSDs. It is managed/controlled via Linux, not via a hardware card. Recently, for no apparent reason, the array needed rebuilding. I rebooted ...
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0answers
24 views

Disorganized disks because of different disk technologies - LVM an answer?

I have a 1 TB spinning HD, and a 256 GB SSD. I keep my OS and large projects on the SSD, for speed. The rest is on the spinning HD, because of its size. The problem: This means I have things to ...
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0answers
245 views

LSI 9207-8i and Samsung 850 PRO TRIM support

A Dell R610 server with LSI 9207-8i HBA card has 6 Samsung 850 PRO SSDs connected to it. hdparm shows TRIM support: sudo hdparm -I /dev/sdc | grep -i trim * Data Set Management TRIM ...
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0answers
183 views

Tuning mdadm RAID 5 performance?

I have a system with dual Intel E5-2620 v3 @ 2.40GHz, 64 GB ram, an LSI 3008 HBA, 8x 1.6 TB Intel S3510 SSDs. I've been playing benchmarking it in different configurations using fio and I've gotten ...
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0answers
82 views

Proper Steps To Upgrade My Server 2008 R2 Machine From HHD To SSD

I'm working on upgrading a server's hard drive from a standard HHD to an SSD drive. I have cloned the drive with a program called "EaseUS Todo Backup Free 8.6" (which I think does a bunch of extra ...
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0answers
36 views

dmcache - is removing cache device without suspending safe?

I'm using plain dmcache for SSD cache - unmount procedure goes this way: umount fs suspend cache device remove cache device close lvm close LUKS shutdown However sometimes dmsetup doesn't allow me ...
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0answers
209 views

Poor SSD I/O performance with rTorrent and Debian

I'm using a Dell PowerEdge R210 II server with Intel Xeon E3-1230, 32GB RAM DDR3, 2 x 480 GB SSDs SATA3, 2 x 1 Gbit network connection. I'm using both network connections at the same time (802.3ad ...
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0answers
45 views

MSW2012R2 StorageSpaces + SSD tiering. Unknown Placement Status

I use StorageSpaces with tiering. I have several vhdx images that I want to be constantly pinned to SSD on my tier. I use command: Set-FileStorageTier –FilePath "path" -DesiredStorageTier "tier" ...
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0answers
200 views

task fstrim blocked for more than 120 seconds

I'm experiencing random crashes on my system. I've narrowed the problem to the fstrim program that's launched weekly by cron. In the console, I've got a set of blocked tasks among whigetch I find ...
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0answers
313 views

What Kind of adapter can I use for a 2.5" SSD into a Dell PowerEdge R320?

I'd purchased a a caddy like this: http://www.amazon.com/gp/product/B00BR0L3U8/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 assuming I would be able to front load this into the R320, but when I ...
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0answers
417 views

SSD+MDRAID+LVM+KVM results in lower performance than expected

We use kvm for virtualization, the disk images are stored as logical volumes. The logical volumes are stored on a bunch of software-RAID1 (mdadm) arrays composed of Intel DCS3500 SSDs (each array is a ...
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0answers
93 views

mysql - measure amount of write

System : Centos 6.4, PerconaDb/MySQL 5.5.31 Im running relatively small mysql database with some 30 databases, total amount of 12Gb, but heavy on reads, updates and writes (texts, posts, user data ...
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0answers
55 views

Why my SSDs are in /dev/hdx instead of /dev/sdx on CentOS 5.9?

I have two SSDs Kingston SH103S3240G plugged on SATA ports of my Intel Server Board S3000AH. The SSDs apear like a PATA device (hdx instead of sdx) on my CentOS 5.9. I'm having problems related to ...
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0answers
733 views

SSD Performance under Oracle

I have serious performance issues with oracle running over ssd. I have two OCZ Vertex 3 MAX IOPS drives (firmware 2.15). It runs on a INTEL C600 SATA Chipset. Windows 2008 R2. So the issue is ...
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0answers
125 views

Considering MySQL on SSD with NTFS and Windows 2008

My company is considering migrating our MySQL data from an HDD array to an SSD, possibly the Intel SSD 520 series. We have a fairly large set of databases, some with upwards of 100 million rows, so we ...
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0answers
185 views

Adding SSD boot disk to machine running RAID 10

I have a server (dev rig) that runs Windows 2008 R2 and boots from a RAID 10 setup. Now I want to add an SSD disk that will contain Windows 7 (could be dual boot, but dont plan on salvaging the ...
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0answers
762 views

VMware Esxi with Kingston SSDNow (No Trim but S.M.A.R.T Garbage Collection)

I recently posted asking whether Trim is supported on VMware Esxi (here) and found out it is NOT. I've read that some SSDs, such as the Kingston SSDNow have hardware garbage collection. Would this ...
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0answers
39 views

hdparm unlock ssd with correct password encoding

I have an old password protected SSD connected via USB to my Linux System. I'm trying to unlock it with hdparm. Problem is my password was ./perspective (it doesn't matter now because I only used it ...
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0answers
32 views

Why does 'fstrim /' destroy my mdadm RAID 1 array?

I've rented two physical servers. The servers are identical, except from the disks. server#1: 2 x SAMSUNG MZ7TE512HMHP-00000 SSD server#2: 2 x SAMSUNG MZ7LN512HMJP-00000 SSD When I run fstrim -v / ...
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0answers
29 views

How to allocate drives with SLURM

I need to share drives (SSDs or hard drives) in a compute node. The Generic Resource (GRES) Scheduling is a Slurm module designed to manage different kind of resources. For instance it gets a plugin ...
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0answers
80 views

ZFS tuning for SSD queue depths

When using SSD on ZFS, what is the best configuration for the vfs.zfs.vdev.max_active parameters? As I know the default of this parameters is 1000, I don't have the intention to change this, but these ...
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0answers
27 views

HP Proliant G6 - Smart Array p410i, RAID 1 Disk upgrade

We currently have 2 500Gb spinning disks in a RAID 1 configuration. Since we are hitting our storage capacity limit, we want to safely replace both disks with 2 larger SSD's. We have a Proliant G6, ...
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0answers
450 views

Using Dell PERC H330 RAID controller with not-dell-certified SSDs

we think about replacing our Dell PowerEdge T100 (2009) with a Dell PowerEdge T330 for our small business. Up to 15 clients are using the MSSql Server, some fileshares and printers. The database size ...
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0answers
35 views

Centos 6 ssd mtip32xx driver command(s) timed out: tagmap

We have some servers with Centos 6 with "Micron Technology Inc RealSSD P320h" ssd drives. We have noticed in the kernel log Feb 11 09:47:32 hostname kernel: mtip32xx 0000:47:00.0: 1 command(s) timed ...
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0answers
177 views

XenServer 6.2 VM Performance (SSD, RAID-10, Quad-core)

Greetings everyone :) My configuration is the following: HP C3000 tower enclosure 1st HP Proliant BL460 G1 quad core xeon 2.66GHz 12MB L2 cache, 24GB RAM, BIOS I15 5/2/2011 partnered with HP ...
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0answers
55 views

SSD Raid 10 Slow write speeds

We have three IBM servers running windows 2012, all identical, they have a Raid (10) of SSD's. However one of the boxes seems to only be able to write at a third of the speed of the others. The other ...
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0answers
242 views

LINUX fio random read write Total BW and IOPS calcluation

My fio ouptut for random readwrite is as shown below. Fio was initiated with 3 numjobs fio --name=test_random_read_write --iodepth=16 --rw=readwrite --bsrange=4k-8k --direct=1 --size=2G --numjobs=3 ...
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0answers
1k views

smartctl error end_request: I/O error, dev sdb, sector

I have a Scientific Linux 6.5 server with a RAID with SSD disks. I see several error on dmesg file but there is no alert or errors provided by the utilities of the RAID controller (LSI controller). ...
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0answers
344 views

Windows Server 2012 not starting when PCIe SSD disk installed

I have Dell Power Edge R905 server with Windows 2012 R2 installed. Everything works great until I install Plextor M6e SSD PCIe x2 card. With card inserted into PCIe x4 or PCIe x8 slot, system starts ...
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0answers
52 views

SQL server HA when running with PCI Flash device

I want to purchase a PCI based Flash storage device for our ESXi server hosting our SQL Server machine. We use SQL Server 2008 standard edition. storage is on Netapp via NFS. It is a VM (ESXi 5.1) ...